Sunnah سنة

Sunnah is the way of life prescribed as normative for Muslims based on the teachings and practices of the Prophet Muhammad and interpretations of Islamic Koran. The word sunna (سنة, Arabic: [sunna] sunan plural سنن [Sunan]) is derived from the root (سن [sa-n-na]), which means a smooth and easy flow or via direct flow. The word literally means a clear and well-trodden path. In the discussion of the sources of religion, sunna denotes the practices of Muhammad that he taught and practically instituted as a master of the Sharia and the best example. According to Muslim belief, this practice will adhere in fulfilling the divine commands, performing religious rites, and mold life according to God's will. Instituting these practices was, as the Qur'an states, part of the responsibility of Muhammad as a Messenger of Allah. (Quran 3: 164, 33:21).
The sunna of Muhammad includes specific words, habits, practices and silent approvals is significant because it addresses the life forms that deal with friends, family and government. Recording the sunna was an Arab tradition and, once the people converted to Islam, brought this custom to their religion. The Sunnah is a source of Islamic law, only surpassed by the Koran. The term "Sunni" denotes those who claim to practice these uses, as part of the Ummah.